Interdental brush



FIG. 1 is a perspective view of an interdental brush showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is an opposite side view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a top view thereof.

The uneven-length broken lines represent unclaimed boundaries of the claimed design. The even-length broken lines showing the remainder of the interdental brush represent unclaimed subject matter and form no part of the claimed design. 

CLAIM The ornamental design for an interdental brush, as shown and described. 